GB1283611A - A process for vaporising phthalic anhydride - Google Patents

A process for vaporising phthalic anhydride

Info

Publication number
GB1283611A
GB1283611A GB60707/69A GB6070769A GB1283611A GB 1283611 A GB1283611 A GB 1283611A GB 60707/69 A GB60707/69 A GB 60707/69A GB 6070769 A GB6070769 A GB 6070769A GB 1283611 A GB1283611 A GB 1283611A
Authority
GB
United Kingdom
Prior art keywords
phthalic anhydride
anhydride
tubes
evaporator
dec
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB60707/69A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chemiebau Dr A Zieren GmbH and KG
Original Assignee
Chemiebau Dr A Zieren GmbH and KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chemiebau Dr A Zieren GmbH and KG filed Critical Chemiebau Dr A Zieren GmbH and KG
Publication of GB1283611A publication Critical patent/GB1283611A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
    • B01D3/322—Reboiler specifications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
    • B01D3/146—Multiple effect distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54—Preparation of carboxylic acid anhydrides
    • C07C51/573—Separation; Purification; Stabilisation; Use of additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

1283611 Phthalic anhydride CHEMIEBAU DR A ZIEREN GmbH & CO KG 12 Dec 1969 [14 Dec 1968] 60707/69 Heading C2C Phthalic anhydride, produced by oxidation of o-xylene, is vaporized from the bottoms of a continuously operated distillation column, which may be in a plant having a plurality of successive columns, by evaporating in a tubular bundle evaporator connected by natural circulation with the column bottoms such that the liquid phase leaving the upper end of the evaporator tubes contains at least 50% by weight of phthalic anhydride plus trimellitic anhydride, and the apparent level of the crude phthalic anhydride in the evaporator tubes is kept at from 30 to 100% of the length of the evaporator tubes. The apparent level of crude phthalic anhydride is preferably kept at 45-75% of the length of the tubes and the liquid phase advantageously contains 60-80% by weight of phthalic anhydride and trimellitic anhydride.
GB60707/69A 1968-12-14 1969-12-12 A process for vaporising phthalic anhydride Expired GB1283611A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1814774 1968-12-14

Publications (1)

Publication Number Publication Date
GB1283611A true GB1283611A (en) 1972-08-02

Family

ID=5716272

Family Applications (1)

Application Number Title Priority Date Filing Date
GB60707/69A Expired GB1283611A (en) 1968-12-14 1969-12-12 A process for vaporising phthalic anhydride

Country Status (7)

Country Link
US (1) US3691022A (en)
BE (1) BE743052A (en)
DE (1) DE1814774B1 (en)
ES (1) ES374510A1 (en)
FR (1) FR2026162A1 (en)
GB (1) GB1283611A (en)
NL (1) NL6918629A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904711A1 (en) * 1989-02-16 1990-08-23 Krupp Koppers Gmbh ESPECIALLY DRIVE COLUMN SUITABLE FOR SEPARATION OF APPLICATION PRODUCTS WITH HIGH BOILING DIFFERENCE
DE19539295A1 (en) * 1995-10-23 1997-04-24 Basf Ag Purification of methacrylic or acrylic acid by distillation separation
EP0854129B2 (en) * 1997-01-17 2007-11-28 Basf Aktiengesellschaft Process for the continuous separation by distillation of liquid mixtures containing (meth)acrylic acid as the main cut

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266748C2 (en) * 1966-05-21 1973-07-19 Basf Ag Process to prevent encrustation of heating surfaces during the continuous distillation of phthalic anhydride

Also Published As

Publication number Publication date
FR2026162A1 (en) 1970-09-11
ES374510A1 (en) 1972-01-01
NL6918629A (en) 1970-06-16
BE743052A (en) 1970-05-14
US3691022A (en) 1972-09-12
DE1814774B1 (en) 1969-12-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee